These rankings are based on the EM-40 Release Site Methodology.

Select a release site to receive information concerning that site.

Please note that not all of the listed sites are linked to further information.

1. 5-Unit Area Groundwater Plume
2. 7-Unit Area Groundwater
3. Barren Area
4. Big Run Creek
5. Chemical and Petroleum Containment Basins/Tanks Near X-533A
6. Don Marquis, Substation, Associated Containment Ponds, Drainage Ditches, and Construction Spoils
7. East Drainage Ditch
8. GCEP Underground Storage TankS
9. Little Beaver Creek
10. Mount Gilead Cemetery
11. North Drainage Ditch & Construction Fill Area
12. Northeast Drainage Ditch
13. Old Northwest Firing Range
14. Peter Kiewit Landfill/XT-847 Warehouse
15. Process Waste Line Soils (X-700, X-705)
16. Railroad Spur Yard Storage Area
17. Recirculating Cooling Water System
18. Recirculating Cooling Water System
19. Recirculating Cooling Water System
20. Recirculating Cooling Water System and Blowdown Line
21. Sanitary Sewer System & X-614A Sewage Lift Station
22. Sanitary Sewer System and X-614P Northeast Sewage Lift Station
23. Sanitary Sewer System, X-614B Sewage Lift Station
24. Sanitary Sewer System/X-614D Sewage Lift Station
25. Storm Sewer System (C,K,L & M)
26. Storm Sewer System (D & E)
27. Storm Sewer System (F,G, H, N & O)
28. Storm Sewers A, B, and J
29. Transformer Cleaning/Storage Pad
30. West Drainage Ditch
31. X-1007 Fire Station
32. X-100L Environmental Control Trailer
33. X-101A Credit Union Trailer
34. X-1020 Engineering Operations Center
35. X-103 Auxiliary Office Building
36. X-104 Guard Headquarters
37. X-104A Indoor Firing Range
38. X-105 Electronic Maintenance Building
39. X-108E C-Portal
40. X-108H Pike Avenue Portal
41. X-109A Personnel Monitoring Building/Waste Oil Reclamation Facility
42. X-109B Personnel Monitoring Building
43. X-1107 DP, DV, EP, EV Northeast and Northwest Pedestrian and Vehicle Portals
44. X-1107AV Interplant Portal (Vehicular)
45. X-111A Monitoring Portal and X-111B Portal Northwest
46. X-114A Firing Range
47. X-116 Storage Trailer
48. X-120 Old Training Facility Site
49. X-206H Parking Lot
50. X-2207D Parking Lot/Cylinder Storage Yard A
51. X-2230M Southwest Holding Pond
52. X-2230N West Holding Pond No. 2
53. X-230J1 East Environmental Sampling Building
54. X-230J3 West Environmental Sampling Building and Intermittent Containment Basin
55. X-230J5 West Holding Pond and Oil Separation Basin
56. X-230J6 Northeast Holding Pond & Secondary Oil Collection Basin
57. X-230J7 East Holding Pond and Oil Separation Basin
58. X-230J9 North Environmental Sampling Building
59. X-230K South Holding Pond, Waste Pile & X-617 pH Adjustment Facility
60. X-230L North Holding Pond
61. X-231A Southeast Oil Biodegradation Plot
62. X-231B Southwest Oil Biodegradation Plot
63. X-300 Plant Control Facility
64. X-3000 Central Control Building
65. X-3001 Process Building (GCEP) - Inactive
66. X-3002 Process Building (GCEP) - Inactive
67. X-326 Process Building
68. X-330 Process Building
69. X-333 Process Building
70. X-334 Transformer Storage and Cleaning Building
71. X-3346 Feed and Withdrawal Facility - Inactive
72. X-342A Feed Vaporization and Fluorine Generation Building, X-342B Fluorine Storage Building, and X-342C Waste HF Neutralization Pit
73. X-343 Feed Vaporization and Sampling Facility
74. X-344A Facility
75. X-344A Settling Tank
76. X-344B/C Uranium Hexafluoride Sampling Facility
77. X-344D HF Neutralization Pit
78. X-344E Gas Ventilation Stack
79. X-344F Safety Building
80. X-345 Special Nuclear Material Storage Building
81. X-530 A-G Switchyard and Associated Buildings
82. X-533A-J Switchyard and Associated Buildings
83. X-600 Coal Fired Steam Plant; X-600A Coal Storage Yard; X-621 Coal-Pile Runoff Treatment Facility
84. X-605H Booster Pump House and Appurtenances, X-605I Chlorinator Building, X-605J Diesel Generator Building
85. X-611 Water Treatment Plant and Appurtenances
86. X-611A Lime Sludge Lagoons
87. X-611B Sludge Lagoon
88. X-612 Elevated Water Tank
89. X-615 Abandoned Sewage Treatment Facility
90. X-616 Effluent Control Facility/ Chromium Sludge Lagoons
91. X-618 North Holding Pond Storage Building
92. X-626 Recirculating Cooling Water Pump House and Cooling Tower
93. X-630-1 Recirculating Water Pump House and X-630-2 A&B Cooling Towers
94. X-630-3 Acid Handling Station
95. X-633 Recirculating Water Pump House and Cooling Towers
96. X-640-1 Pump House and Associated Underground Diesel Storage Tanks
97. X-640-2 Elevated Water Tank
98. X-6619 Sewage Treatment Facility
99. X-700 Chemical Cleaning Facility Soils
100. X-700 CT Chemical and Petroleum Storage Containment Tanks
101. X-700 Tank No. 6
102. X-700 Tank No. 7
103. X-700 Tank No. 8
104. X-700A Air Conditioning Equipment Building
105. X-700T TCE/TCA Outside Storage Tank Soils
106. X-701A Lime House
107. X-701B Area Groundwater
108. X-701B Holding Pond & Retention Basin Soils
109. X-701BP Northeast Oil Biodegradation Plot
110. X-701C Neutralization Pit Soils
111. X-701D Water De-ionization Facility
112. X-701E Neutralization Building
113. X-701F Effluent Monitoring Building
114. X-705 Decontamination Building Soils
115. X-705A Radioactive Waste Incinerator/X-705B Contaminated Burnables Storage Lot Soils
116. X-705D Heating Booster Pump Building
117. X-710 Technical Services Building/Neutralization Pit Soils
118. X-720 Maintenance Building Soils
119. X-720 Neutralization Pit & Soils
120. X-720A Maintenance Building Gas Manifold Shed
121. X-720B Radio Base Station Building
122. X-720C Paint and Oil Storage Building
123. X-734 Old Sanitary Landfill; X-734A Construction Spoils Landfill; X-734B Old Construction Spoils Landfill
124. X-735 Sanitary Landfill (North)
125. X-735 Sanitary Landfill (South) & X-735 Building
126. X-740 Soils and GW
127. X-741 Oil Drum Storage Facility
128. X-744B Salt Storage Building
129. X-744H Bulk Storage Building
130. X-744J Bulk Storage Building
131. X-744L Store and Maintenance Warehouse
132. X-744N, X-744P, X-744Q Warehouse, and Associated Old Construction Headquarters Area
133. X-744RW Retrievable Waste Storage Area
134. X-744S, X-744T, X-744U Warehouses
135. X-744W Surplus and Salvage Warehouse
136. X-744Y Storage Yard & X-744G Bulk Storage Building Soils. ***
137. X-745B Process Gas Yard
138. X-745C West Cylinder Storage Yard
139. X-745E Process Gas Yard
140. X-745F Process Gas Yard
141. X-747A, B, C, D, and E Material Storage Yards
142. X-747F Miscellaneous Material Storage Yard
143. X-747G Northeast Contaminated Material Storage Yard Soils
144. X-747H Northwest Surplus and Scrap Yard
145. X-748 Truck Scales
146. X-749 Contaminated Materials Disposal Facility/X-120 Groundwater Plume
147. X-749 North Contaminated Materials Disposal Facility
148. X-749 South Contaminated Materials Disposal Facility
149. X-749A Classified Materials Burial Grounds
150. X-750 Fuel Station & Waste Oil Tank
151. X-751 Mobile Equipment Maintenance Shop
152. X-752 Hazardous Waste Storage Facility
153. X-760 Pilot Investigation Building & Neut. Pit Soils
154. X-7725 Recycle Assembly Building, X-7745R, Recycle Assembly Storage Yard and Initial Construction Bulk Fuel Storage Area (BFS)
155. X-7725A Waste Accountability Facility (GCEP) and X-7727H Transfer Corridor (GCEP)
156. X-7726 Centrifuge Training and Test Facility